Southern Africa Collection

The Grassland Society of Southern Africa (GSSA) is involved and concerned with the science and practice of range and pasture management. This broad field involves primarily the use and conservation of natural resources. It encompasses applied fields such as livestock production, wildlife management, nature conservation, water catchment management and range and mine-dump rehabilitation. The disciplines include, amongst others, ecology, botany zoology, range and pasture science, animal science, soil science and genetics. This collection includes journal articles from the African Journal of Range and Forage Science as well as related articles and reports from throughout the Southern African region.

Contact
Grassland Society of Southern Africa
Address: 
GSSA
PO Box 41
Hilton
3245
South Africa
Total Entries in Collection: 
3603

Records in Collection

Published: 2007
Indigenous forests and savannas, along with plantation forests, offer numerous benefits to rural communities and society at large. Yet, the role of forests and forestry in contributing to sustainable livelihoods and poverty alleviation are widely...
Published: 2008
The most practical and effective method to increase dry matter production in rangelands is by adequate fertilization. N and K fertilizers have commonly been used worldwide to increase yield in rangelands. Fertilizers have a significant effect on...
Published: 2008
It is probable that plants of the genus Sceletium (Mesembryanthemaceae) have been used as masticatories and for the relief of thirst and hunger, to combat fatigue, as medicines, and for social and spiritual purposes by San hunter-gatherers (...
Published: 2008
Despite the ubiquity of sub-tropical savannas throughout the earth, limitations of savanna productivity are understudied relative to other terrestrial systems. The limitations of savanna productivity by precipitation have been documented but the...
Published: 2007
Researchers and managers debate the relevance of non-equilibrium dynamics in rangelands, where ungulate populations are more closely associated with abiotic events than forage availability, and density independence is common. Rules-of-thumb state...
Published: 2007
This study explored the impacts of sustained heavy grazing in six vegetation types across an altitudinal and rainfall gradient in the Kamiesberg mountain range in Namaqualand. The study was carried out across the fence separating the Leliefontein...
Published: 2008
Namibian rangelands are encroached with Acacia mellifera, partially resulting from a poor understanding of vegetation dynamics. A conceptual state-and-transition model of vegetation dynamics in the semiarid Highland savanna in central Namibia,...
Published: 2007
The Kalahari sand sheet, with a 2.5-million ha area, is probably the largest continuous surface of sand in the world. The Kalahari Transect (KT) is one of a set of IGBP 'megatransects ' identified for global change studies and provides an...
Published: 2007
The Richtersveld is situated in an arid environment and its inhabitants are confronted with various hazards. Based on data collected during 22 months of ethnographic fieldwork, the livelihood strategies of Richtersvelders are explored. Besides a...
Published: 2007
Plant invasions are a serious threat to natural and semi-natural ecosystems worldwide. Most management-orientated research on invasions focuses on invaders that are already widespread and often have major impacts. This paper deals with '...
Published: 2008
Key resource areas (KRAs), defined as dry season foraging zones for herbivores, were studied relative to the more extensive outlying rangeland areas (non-KRAs) in Kenya. Field surveys with pastoralists, ranchers, scientists and government officials...
Published: 2007
Pastoral production around artificial watering points in semi-arid environments affects the density and composition of plant communities. In the Kalahari desert of southwestern Africa, bush encroachment is often regarded as the major form of land...
Published: 2008
Ethnopharmacological context Cape herbal medicine as a distinct and unique healing system is conceptualized for the first time, together with a first compilation of the authentic materia medica of the system.Materials and methods The early...
Published: 2007
Biodiversity is a critical component of the natural environment and the protection of it often meant the displacement of local communities in developing countries. The Richtersveld National Park (South Africa) is unusual in that it forms part of the...
Published: 2008
There is an urgent need for quantitative methods by which actual, as opposed to potential degradation can be mapped using spatially consistent criteria for large regions. This study tested the Local NPP Scaling (LNS) method, where the growth season...
Published: 2007
Models predict that desertification, the loss of perennial grasses in arid and semiarid environments, will be difficult to reverse due to the positive feedback between plant cover and water infiltration; reductions in plant cover concurrently reduce...
Published: 2007
Fire plays a critical role in breaking hard-seeded dormancy and establishing seedlings of several Acacia species in arid and semi-arid regions. Numerous studies have reported an increase in seedling densities of some Acacias after fire without...
Published: 2007
The importance of wild edible herbaceous species to resource poor households in most rural economies within savannas has been little studied. This is because most of the herbs grow in impoverished species communities and lands, often referred to as...
Published: 2008
Changes in species richness and vegetation composition in the diverse semi-arid Succulent Karoo vegetation of South Africa were investigated after 67 (1937-2004) years of rest from livestock grazing at the Worcester Veld Reserve (WVR). This 72 ha...
Published: 2007
In South Africa, 'black ' and 'coloured ' farmers engaged in several occupational activities are often considered as being 'not interested in farming ' or 'not serious '. However, in Namaqualand the large...
Published: 2008
Aim of the study Livestock keepers in many developing countries with restricted access to orthodox veterinary healthcare services commonly use traditional remedies to treat their animals when disease is encountered. This review collates the...
Published: 2008
A number of studies have begun to show the large impact that pastoralism has on African savanna ecosystems. Here we look at the impact of abandoned settlements on the distribution of the large ungulates of Amboseli, Kenya. Monthly dung counts show...
Published: 2007
The phenology of three dominant and economically important tree species; Acacia erioloba, Acacia luederitzii and Acacia mellifera, all widespread in the Kalahari in Botswana, was studied at Tsabong (25 176;56.65'S, 22 176;27.72'E) and Maun...
Published: 2008
We tested the scaling effects of proximate desertification drivers (i.e. soil erosion, bush encroachment and grazing pressure) on soil nutrients in northeastern Tanzania. We analyzed nutrient concentrations in the desertified and non-degraded...
Published: 2007
Livestock grazing may or may not be an exogenous disturbance facilitating the spread of exotic grasses, perhaps depending on the historical importance of native ungulates in a particular grassland. We compared canopy cover of native grasses and two...
Published: 2007
Three-quarters of a century ago diamond mining was added to livestock grazing and cereal cropping as a serious cause of landscape degradation in the north-western semi-arid region of South Africa, Namaqualand. Since that time the activities of...
Published: 2007
This paper analyses the role of institutions in the management of common pool resources (CPRs) in semi-arid Tanzania. Common property regimes have often been considered inadequate for the management of CPRs because of the problems of excludability,...
Published: 2008
Livestock overgrazing can threaten the ecological integrity of rangelands, and can also threaten the sustainability of pastoralist societies who depend on rangelands for their livelihood. Using facilitator plants in the restoration of degraded semi-...
Published: 2007
The aim of this study was to determine the effect of drought on grazing patterns of livestock in a communal rangeland in Namaqualand. Water points were the foci of almost all grazing routes even after the drought, and the areas away from the water...
Published: 2006
There are many individuals in the Bredasdorp/Elim area who still use plants as medicines to treat many conditions. This study aimed to document some of this knowledge and present an inventory of all the plants in use in the area. Over 40 individuals...
Published: 2008
The ability to produce vegetative shoots is a form of persistence in arid and semiarid savannas allowing trees to survive herbivory, fire and cutting. In terms of growth rates and survival, this form of rejuvenation may be more successful than...
Published: 2007
This paper introduces the Special Issue on Sustainable Land Use in Namaqualand which arose out of a conference held in the region in May 2005. It outlines the main themes and issues covered by 19 papers within an increasingly interdisciplinary...
Published: 2008
Bush encroachment is a phenomenon that affects semi-arid savannas world-wide. To apply effective browsing to control trees, the browse-browser interaction must be well understood. An important aspect is feedbacks between browsers and trees because...
Published: 2007
The impact of long-term high grazing pressure on geomorphological features, plant community composition and cover and soil characteristics of an ephemeral river system in Namaqualand, South Africa, was compared to that of lighter grazing pressure...
Published: 2007
We investigated the effects of rainfall and the number of animals on changes in vegetation and on the output of milk and meat from the communal areas of Namaqualand. Previously published short- and long-term models link processes that range from the...
Published: 2007
Semi-structured focus group interviews were employed to examine factors that affect the likelihood that resource managers in southern Africa will use information on vegetation fires provided by two satellite-derived products: an active fire product...
Published: 2008
This paper provides values for nitrogen isotopic abundances of southern African soils and plants along land use gradients of varying aridity. The ?15N values of soils and plants were generally higher in sites with greater land use intensity, except...
Published: 2007
In South Africa, interventions in communal rangelands proposed by most agriculture-sector institutions are still dominated by the belief that communal herders have little technical skills and by the tenets of "the tragedy of the Commons",...
Published: 2008
This paper reports an assessment of the current and potential impacts of invasive alien plants on selected ecosystem services in South Africa. We used data on the current and potential future distribution of 56 invasive alien plant species to...
Published: 2008
Biological soil crust (BSC) communities (composed of lichens, bryophytes, and cyanobacteria) may be more dynamic on short-time scales than previously thought, requiring new and informative short-term monitoring techniques. We used repeat digital...
Published: 2007
This paper provides a brief introduction to the physical environment of Namaqualand as well as an overview of patterns of plant diversity. The diverse array of parent material and geological processes that have shaped the region since the break up...
Published: 2008
Sutherlandia frutescens (tribe Galegeae, Fabaceae), a popular plant in traditional medicine, is indigenous to South Africa, Lesotho, southern Namibia and southeastern Botswana. It is chemically, genetically and geographically extremely variable and...
Published: 2008
This paper provides a reappraisal of contemporary perspectives on climate change in southern Africa's Okavango Delta sub-region by drawing on time-line evidence from historical/archival records, field-compiled information and multi-date...
Published: 2007
Rapid growth of the black rhino (Diceros bicornis) population in the Great Fish River Reserve (GFRR), South Africa, has potential to negatively impact the semi-arid thicket vegetation that occurs in the reserve. Woody plants presenting nutritious...
Published: 2007
We tested the theories on hierarchical foraging by large herbivores by studying selection of woody browse by goats in a semi-arid savanna. In the smallest scale, we compared characteristics of woody plants browsed by observed goats with those of all...
Published: 2008
Semi-arid areas are often considered to be environmentally and economically marginal, a situation which has been exacerbated by economic change, shifts in agricultural production and land use, and changing state policy. These themes are explored...
Published: 2007
A transdisciplinary synthesis, grouped into four main themes, of the key papers in this Special Issue on Namaqualand is provided. Perspectives on current environmental, economic and social issues in the region are interpreted in the context of the...
Published: 2007
A national-level land degradation risk monitoring system identified an important grazing area in central northern Namibia as an area at risk of environmental change. A time series analysis of primary indicators used for this monitoring system for...
Published: 2008
This paper derives the optimal level of restorative efforts required to restore environments degraded by invasive species invasion. Specific attention is focused on a case when restoration faces the risk of failure through relapse of the restored...